Method of stripping cables



1, 1,11 Dec. 30, 1924. JACOBSON 55. @3

METHOD OF STRIPPING CABLES Original Filed March 28'. 192 2 Sheets-Sheet 1 [NYE/V70 SWNUEL JBCOBSO/V Dec. 30. 1924.

S. JACOBSON METHOD OF STRIPPING CABLES Original Filed March 28, @92 2 Sheets-Sheet -2 [NI/EN TOR SH/W/EL Jficosso/v sya ian fl SAMUEL JACOBSON, or san rn'encrsco,

r r ceztrronrire ASSIGNOR :ro FEDERATED METALS CORPORATION, A. conroR-e'rron on DELAWARE.

armada or gramme ensi n s.

original a nea-1n fil ed Maren as, less, Serial no. eaaeea. Divided and this application filed may 10, U 1924. Serial no. traces,

TaaZZ whom it may. concern:

. Be it known;.that LSAivrunnJAooBsorr, a citizenfof the United States, residing in the citya'nd county of San Francisco and State of California, have invented new and useIul Improvements in Methods of Stripping Cables, of which the following is a specification.

This invention relates to a method of re- ,fmoving telephone cable from its sheath, and

the application is a division of my copending application entitled Cable stripping machine filed March 28, 1925 Serial No. 628,- 393. a

When telephone cable has served its period of usefulness the materials therein are salvaged by removing thecable from its sheath and melting the different metals into ingots for repetitive use. As the cable is firmly packed in the sheath the problem of econo'mica'lly removing it therefrom has always 7 been pressing.

It is the object of the present invention to provide an improved method for rapidly removing the sheath fromthe cable in an inexpensive manner. 1 V

In carrying out the invention thesheath of the cable is. first severed: at the center,

after which the opposite ends of the sheath arepulled in opposite directions to strip the sheath from the cable core. During the stripping of the sheath from the core the latter is held stationary.

In the drawings accompanying the present application I show an apparatus for carrying out my improved method. In these drawings: i V

Fig. 1 is a plan view of the preferred embodiment of an apparatus for carrying out my improved method. I

Fig. 2 is a side elevation of the same.

Fig. 3 is an end elevation of the apparatus.

Fig. 4 is a vertical and transverse section frame and a clamping jaw 15 which is mounted in a guide 15 for movement to ward and away from the fixed jaw. The clamping jaw may be operated by a fulcrum lever 16, which is pivoted to the frame, at 17 and which connects with the clamping jaw 15 by a. link 18.

A pair or movable gripping devices is pro vided. These devices each comprise a guide shoe 11 which is slidably mounted on one of the ra ls 11. The guide shoe is'formed with a gr1pperjaw21 which cooperates with .a movable gripper jaw 22, both of which jaws are formed with concave gripping faces. Themovable jaw is connected to the guide shoe 11 by parallel links 22 ofequal length. One of these links is formed'with an extension 23 which is connected by an operating link 24 to a slide 25. This slide is mounted on the rail 11 for movement longitudinally thereof.

It is intended that the gripping devices be operated in unison and be reciprocated along the guide rails in opposite directions. To accomplish this operating cables 26 are secured to and wound around a central drum 27 and led over sheaves 28, which are ournalled one at each end of the frame.

-The ends of the cables are connected to the slides of the gripping devices. The drum mentioned is journalled below the rails and is driven by a reversible motor 29 which drives the drum through a worm and gear reduction set 30 The motor is controlled by a controller 31.

It is obvious that when the drum is driven in a direction to wind up the cables 26, the gripping devices will be drawn outwardly from the center of the frame along the guide rails 11. To return these devices to their normal position a second pair of cables 32 is provided. These cables are wound on the drum and are led over sheaves 33, which are journalled adjacent to the inner ends of the rails, and are con nected to the extensions 23 of the links 22. The cables 26 and 32 are oppositely wound on thedrum. That is, when the cables. 26

are winding'up on the drum the cables 32 are unwinding, and vice versa, It is obvious that when the motor is driven in one direction the drum will wind up the cables 26 and pull the gripping devices out wardly from the center of the frame and when the motor is reversed the drum will wind up the cables 32 to return the gripping devices to normal position. The

gripping devices automatically open and close due to their peculiar construction" and to the manner in which they are connected tothe operating cables. This is best illustrated in Figs. 5 and 6. When pull is exerted. on the slides itgis im parted through operating links 24 to the extensions 23 of the linlis 22 and tends to swing the same to force the movable gripper jaws toward the relatively stationary ones. Similarly when pull is exerted on the cables 32 the extensions 23' of the links 22 are swung in the opposite direction to separatethe gripperjaws. I

From the above it is obvious that at the 'beginning of the operative period of, the cables 26 the gripper jaws are first closed to grip the sheath of -a telephone cable inserted therein and then the gripping de vices travel in oppositedirections. 'When bythe machine here disclosed is constructed ofa core formed of a considerable number This core is of insulated copper wires. tightly sheathed'in a lead tube. However, the machine will operate upon cables of of the maChine are in the positions shown in Figs. 1 and'2, the sheath of the length of cable'to be operated upon is firstsevered v at the center and is then placed lengthwise" in the machine between the aws of the gripping devices are then drawn along the. n V

clamping device 12 and the gripping de-l vices. The motor is then' started to rotate the drum to'wind up the cables '26. When pull is exerted on these'cables their first action is to close the gripper jaws to grip the sheath of the telephone cable. The

the appended claims. 7

j j operation, and holding the core of the cable different constructions with equal efficiency. Inoperation, assuming that the'elelnents rails in opposite directions to strip the halves of the sheath from the'cablej As soon as the stripping action has 00111 menced theoperator swings the lever 16 to machine. 7 The motor is then reversed to e turn the gripping devices to normalposi-Q tion for a second operation.- 'As described,"

the grip-per jaws will automatically open when being returned to normal position.

' From the foregoing it is obvious that a very simple and efiicient-method-of remov- .ing the-sheath from the cablejhas been dis-V closed, and while I have shown the pre erred :lorm otmy invention, it is 'understood that various changes in the steps in the method my be resorted to, without. departing from the" inventionas defined-inj- Having thusdescribed inventiomwhat I claim and desire to secure b'y Letters -Patentisz' 1. Aniethod lengths of cable, which consists in severing the sheath at approximately the, center thereof and then simultaneously gripping" both ends of the sheath and stripping-them from the core of the cable in a continuous operation. 7

2. A method of removing the sheath from lengths of cableywhich consists insevering r thev sheath at a iproxiznately the center thereof and then simultaneouslygripping bothends of the sheath, and stripping'them' from the core of the cable in a continuous sheath substantially at the center thereof, f then simultaneously grippingboth portions '01": the sheath and exerting a pull thereouin v opposite directions to separate sa-id portions to strip them 'from the core of the cable and then grip thecore of the cable intermediate he contiguous portions of said sheath to hold the cable stationary during the t j P g operation.

SAMUEL J oonsoN.

8U of removing the sheathfrom 

